pecks epcks pceks cpeks ecpks cepks pekcs epkcs pkecs kpecs ekpcs kepcs pckes cpkes pkces kpces ckpes kcpes eckps cekps ekcps kecps ckeps kceps pecsk epcsk pcesk cpesk ecpsk cepsk pesck epsck pseck speck espck sepck pcsek cpsek pscek spcek cspek scpek ecspk cespk escpk secpk csepk scepk peksc epksc pkesc kpesc ekpsc kepsc peskc epskc psekc spekc espkc sepkc pksec kpsec pskec spkec kspec skpec ekspc kespc eskpc sekpc ksepc skepc pckse cpkse pkcse kpcse ckpse kcpse pcske cpske pscke spcke cspke scpke pksce kpsce pskce spkce kspce skpce ckspe kcspe cskpe sckpe kscpe skcpe ecksp ceksp ekcsp kecsp ckesp kcesp ecskp ceskp esckp seckp csekp scekp ekscp kescp eskcp sekcp ksecp skecp cksep kcsep cskep sckep kscep skcep
Note: these 'words' (valid or invalid) are all the permutations of the word pecks. These words are obtained by scrambling the letters in pecks.